Experimental Investigation of the Influence for Stoping Sequence and Granular Grading on Lateral Pressure during the Nonpillar Sublevel Caving Mining

Table 4

Summary of stoping sequence.

Stoping sequence	Summary
Interval face	(1) Unfold the drawpoints of II and V; (2) recorded the values of lateral pressure during the drawing process; (3) blocked the corresponding drawpoint once the waste rocks were drawn from the drawpoint; (4) let the drawing-ore device sit for 20 minutes; (5) unfold the drawpoints of I and III; (6) repeated the step of (2) and (3).
From center to end	(1) Unfold the drawpoints of II and III; (2) recorded the values of lateral pressure during the drawing process; (3) blocked the corresponding drawpoint once the waste rocks were drawn from the drawpoint; (4) let the drawing-ore device sit for 20 minutes; (5) unfold the drawpoints of I and V; (6) repeated the step of (2) and (3).
From end to center	(1) Unfold the drawpoints of I and V; (2) recorded the values of lateral pressure during the drawing process; (3) blocked the corresponding drawpoint once the waste rocks were drawn from the drawpoint; (4) let the drawing-ore device sit for 20 minutes; (5) unfold the drawpoints of II and III; (6) repeated the step of (2) and (3).